ALSA: usb-audio: Add private_data pointer to usb_mixer_elem_info
Add a private_data pointer to usb_mixer_elem_info to allow other mixer
implementations to extend the structure as necessary.
Signed-off-by: Chris J Arges <chris.j.arges@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/usb/mixer.h b/sound/usb/mixer.h
index 2c7b9c9..7423f99 100644
--- a/sound/usb/mixer.h
+++ b/sound/usb/mixer.h
@@ -53,6 +53,7 @@
int cached;
int cache_val[MAX_CHANNELS];
u8 initialized;
+ void *private_data;
};
int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
